package com.zy.reggie.service.serviceImpl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.zy.reggie.common.CustomException;
import com.zy.reggie.entity.Category;
import com.zy.reggie.entity.Dish;
import com.zy.reggie.entity.Setmeal;
import com.zy.reggie.mapper.CategoryMapper;
import com.zy.reggie.service.CategoryService;
import com.zy.reggie.service.DishService;
import com.zy.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;

    /**
     * 根据id删除--分类，删除之前需要进行判断
     * @param id
     */
    @Override
    public void remove(Long id) {
        //1. 添加查询条件，根据分类id进行查询菜品数据
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper();
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int count = dishService.count(dishLambdaQueryWrapper);
        if(count>0) {
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }
        //2.查询当前分类是否关联了套餐，若有则抛出异常
        LambdaQueryWrapper<Setmeal> SetmealLambdaQueryWrapper = new LambdaQueryWrapper();
        SetmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int count2 = setmealService.count(SetmealLambdaQueryWrapper);
        if(count2>0) {
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }
        super.removeById(id);

    }
}
